ElectroGeek007
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Activity: 79
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July 06, 2011, 01:18:43 PM |
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ok with my actual HD 5850 I reah 395MH/s with 1000/300 at 1200mV (80°C)
I wanted to push a little and reach 400MH/s
You can probably reach 400MH/s by playing with the software rather than pushing the card further. I've found setting which will give me 413 MH/s for a 1000MHz 5850 but you might have to pull that back a bit if your rig is not a dedicated miner. Let me know if you want details. Do you have the latest miner kernel code? There have been some improvements in the last few weeks. I use GUIMiner (last version) with those option : -v -w 256 VECTORS BFI_INT AGGRESSION=13 FASTLOOP=false Is there something to change? It may behoove you to read this thread: http://forum.bitcoin.org/index.php?topic=25860.0You can use Phoenix with GUIMiner now, I believe, and this modified phatk kernel really does make a difference on my cards, YMMV of course. |
"And what the enemy will see, they will see the flash of our cannons, and they will hear the ringing of our swords, and they will know what we can do! By the sweat of our brow and the strength of our backs and the courage in our hearts! Gentlemen, hoist the colors!"
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teukon
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Activity: 1246
Merit: 1002
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July 06, 2011, 01:56:12 PM
Last edit: July 06, 2011, 02:15:07 PM by teukon |
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ok with my actual HD 5850 I reah 395MH/s with 1000/300 at 1200mV (80°C)
I wanted to push a little and reach 400MH/s
You can probably reach 400MH/s by playing with the software rather than pushing the card further. I've found setting which will give me 413 MH/s for a 1000MHz 5850 but you might have to pull that back a bit if your rig is not a dedicated miner. Let me know if you want details. Do you have the latest miner kernel code? There have been some improvements in the last few weeks. I use GUIMiner (last version) with those option : -v -w 256 VECTORS BFI_INT AGGRESSION=13 FASTLOOP=false Is there something to change? The settings you are using are very good for these cards using phatk (I can only assume GUIMiner uses phatk). Now that I see that these settings are good I ask whether or not you are using SDK 2.1. For me SDK 2.1 is a fair bit faster than SDK 2.4 (with either Catalyst 11.5 or Catalyst 11.6). If you are currently using SDK 2.4 then I suggest you give 2.1 a go. Another thing to consider is whether or not the read-out from GUIMiner is taking a moving average before displaying the hashing speed. I know phoenix does this by default and I have to pass it '-a 1' to make it stop. If you manage to remove the moving average filter from the readout then you may see your hash rate jumping up and down, perhaps by a few MH/s. Try to reduce this jitter as much as possible by closing other running programs and/or reducing desktop effects/resolution if your card is driving the GUI. Finally, because your clock is as high as 1000MHz you may find you gain another megahash by increasing the RAM frequency to 350 or so. |
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CNMOH
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Activity: 266
Merit: 10
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July 06, 2011, 03:56:40 PM |
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ok with my actual HD 5850 I reah 395MH/s with 1000/300 at 1200mV (80°C)
I wanted to push a little and reach 400MH/s
You can probably reach 400MH/s by playing with the software rather than pushing the card further. I've found setting which will give me 413 MH/s for a 1000MHz 5850 but you might have to pull that back a bit if your rig is not a dedicated miner. Let me know if you want details. Do you have the latest miner kernel code? There have been some improvements in the last few weeks. I use GUIMiner (last version) with those option : -v -w 256 VECTORS BFI_INT AGGRESSION=13 FASTLOOP=false Is there something to change? -w 128 gives me better results with my 5850. |
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gellimac
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July 06, 2011, 04:23:15 PM |
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if have better result with -w 256 ^^
If I use SDK 2.1 I have to use to an other version of AMD Catalyst isn't it?
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teukon
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Activity: 1246
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July 06, 2011, 04:59:14 PM |
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-w 128 gives me better results with my 5850.
Interesting. When I change to 128 my rate drops by a full 10 MH/s per 5850. Perhaps there are other settings which need to be changed in tandem to yield an improved rate. Could you let me know your other settings? RAM speed, SDK version, Catalyst version, kernel type/version/patches, kernel parameters. If your comments can improve my rate I'll tip in BTC. |
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teukon
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Activity: 1246
Merit: 1002
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July 06, 2011, 05:07:59 PM |
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Sapphire 5850 Xtreme @ Stock Voltage, 1000,300MHz this is one extremely lucky boy  Now that's what I'm talking about! Very nice! Can you increase the RAM speed a little without losing stability? If so you might score another MH/s. I'm thinking around 350-360 MHz. With lots of tweaking and testing the best I've gotten from a 1000MHz Sapphire 5850 Xtreme @ stock voltage is 413.3 MH/s (fluctuating between 413.1 and 413.5). If you can beat that then please let me know for some BTC. Can you push the core clock any higher than 1000 MHz? Are you bound by Trixx or by stability? |
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whopper
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Activity: 24
Merit: 0
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July 06, 2011, 05:12:27 PM |
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I'm running linux headless, so I use aticonfig and adjust my base-clocks at bios level. I will try to do some optimizations, I will let you know  |
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gellimac
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July 06, 2011, 05:13:27 PM |
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Now that's what I'm talking about! Very nice!
Can you increase the RAM speed a little without losing stability? If so you might score another MH/s. I'm thinking around 350-360 MHz.
With lots of tweaking and testing the best I've gotten from a 1000MHz Sapphire 5850 Xtreme @ stock voltage is 413.3 MH/s (fluctuating between 413.1 and 413.5). If you can beat that then please let me know for some BTC.
Can you push the core clock any higher than 1000 MHz? Are you bound by Trixx or by stability?
can you told me how do you reach 413MH/s? |
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teukon
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Activity: 1246
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July 06, 2011, 05:24:52 PM |
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Now that's what I'm talking about! Very nice!
Can you increase the RAM speed a little without losing stability? If so you might score another MH/s. I'm thinking around 350-360 MHz.
With lots of tweaking and testing the best I've gotten from a 1000MHz Sapphire 5850 Xtreme @ stock voltage is 413.3 MH/s (fluctuating between 413.1 and 413.5). If you can beat that then please let me know for some BTC.
Can you push the core clock any higher than 1000 MHz? Are you bound by Trixx or by stability?
can you told me how do you reach 413MH/s? I will but I'll give whopper a day or two to try and beat me and claim some BTC. It's not the same challenge if I give him all of the information I have. I will say that I am using Linux headless and driving everything with ssh so whopper and I are on a level playing field. I don't know about adjusting base-clocks at bios level so I hope to learn some more myself with this little challenge. |
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gellimac
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July 06, 2011, 05:29:41 PM |
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You me to pay you to know how I can gain 13 MH/s  All right if you want but for now I have only 0.00006084 BTC it is all I can give... |
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teukon
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July 06, 2011, 06:07:51 PM |
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You me to pay you to know how I can gain 13 MH/s All right if you want but for now I have only 0.00006084 BTC it is all I can give... No. I simply want to give whopper some time to try and improve on my rate. |
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whopper
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July 06, 2011, 06:27:06 PM |
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I can only get it up to 412.0 MH/s  not incorporating the recently made kernel improvements posted at this board |
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teukon
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July 06, 2011, 06:43:44 PM |
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I can only get it up to 412.0 MH/s not incorporating the recently made kernel improvements posted at this board Can you get it higher with the kernel improvements? No improvements have helped my rate since the MA tweak. Feel free to use the recent improvements (from earlier today) to beat 413.3 MH/s. If you have 412.0 MH/s then I'm hopeful you'll beat it and I'll find out how to improve my rates. |
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whopper
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July 06, 2011, 07:12:44 PM |
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Can you get it higher with the kernel improvements? Looks like we need SDK 2.4 for this, but I will stay with 2.1 at the moment |
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teukon
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July 06, 2011, 07:18:37 PM |
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Can you get it higher with the kernel improvements? Looks like we need SDK 2.4 for this, but I will stay with 2.1 at the moment You and I are clearly of one mind. As you probably know from the latest patch thread http://forum.bitcoin.org/index.php?topic=25860.40I've already tested SDK 2.4 a little and found that at high core clock speeds SDK 2.1 is still slightly superior for the Sapphire HD5850 Xtreme. If you are done with trying then let me know and I'll fill gellimac in on the details of my configuration. |
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whopper
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July 06, 2011, 07:29:41 PM |
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You and I are clearly of one mind. Hehe I guess so Maybe it will change with the new SDK 2.5, so we can squeeze out a little more Hashes |
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teukon
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July 06, 2011, 07:39:51 PM |
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Hehe I guess so Maybe it will change with the new SDK 2.5, so we can squeeze out a little more Hashes Yes, I look forward to when that is released. As far as I can tell there's a early version out but it's only usable on Windows. By the way, how are you using phatk? Are you driving it through phoenix? If so be aware that, by default, the readout is an average of the last 10 rates and this can be disabled with the flag '-a 1'. I find the moving average is only useful if your MH/s is leaping around by more than 1 MH/s say which shouldn't be the case here. |
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whopper
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July 06, 2011, 07:43:48 PM |
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I'm running poclbm
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CNMOH
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July 06, 2011, 08:00:53 PM |
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-w 128 gives me better results with my 5850.
Interesting. When I change to 128 my rate drops by a full 10 MH/s per 5850. Perhaps there are other settings which need to be changed in tandem to yield an improved rate. Could you let me know your other settings? RAM speed, SDK version, Catalyst version, kernel type/version/patches, kernel parameters. If your comments can improve my rate I'll tip in BTC. For me, it's the opposite. I lose 10 MH/s if I set -w 256. I'm actually using Phoenix, so my settings look a bit different: start /DC:\Bitcoin\phoenix phoenix.exe -u http://******:******@eu.triplemining.com:8344 -k poclbm VECTORS BFI_INT AGGRESSION=11 DEVICE=0 WORKSIZE=128 |
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